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    <title>Document</title>
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    <script>

        // 赋值运算符  
        //   = 
        //   += 
        //   -=
        //   *=
        //   /=
        //   %=

        var x = 1 ;
        // x = x + 1 ;
        x += 1 ;
        console.log(x) ;  // 2
        x -= 2 ;
        console.log(x) ;  // 0
        x *= 3 ;
        console.log(x) ;  // 0 
        x = 4 ;
        x /= 2 ;
        console.log(x) ;  // 2
        x %= 3 ;
        console.log(x) ;  // 2
    </script>
    
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